The study, published in the American Thoracic Society’s American Journal of Respiratory and Critical Care Medicine, tracked 50 patients with both OSA and uncontrolled Type 2 diabetes. Some were asked to use CPAP masks, while the others were not.

After six months, the researchers found CPAP users had lower levels of insulin resistance and hemoglobin (HbA1c) levels — key markers of diabetes — than nonusers. In addition, the CPAP group had fewer inflammatory proteins and other biomarkers associated with Type 2 diabetes blood sugar control.